Calculating machine



Feb. 14, 1939. E. c. WALTER 2,147, 359

CALCULATING MACHINE Filed June 9, -l936 2 Sheets-Sheet l INVENTOR. fDWfi/PD C W44 TEE,

ATTORNEY,

E C. WALTER Feb. 14, 1939.

CALCULATING MACHINE 2 Sheets-Sheet 2 Filed June 9, 1936 2 9. m m H U m U U m 6 U m T m W 0 U V a W 00 H B D W A M 65 0 w "U y 5 D D U U D W H D M 6 m Inna U U U U w H z m C H U U 2 U H. U U

Patented Feb. 14, 1939 PATENT OFFICE CALCULATING MACHINE Edward 0. Walter, Orange, N. J., assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application June 9, 1936, Serial No. 84,378

6' Claims.

The invention relates to calculating machines, and more particularly to tens carry mechanism therefor, the present application being a continuation in part of application Serial Number 60,176, filed January 22, 1936 which issued August 10, 1937 as Patent No. 2,089,820.

An object of the invention is to secure a carry of the tens to the extreme left hand numeral wheel in any shifted position of the carriage Without undue crowding of the carry phase of the operating cycle by adaptation of the progressively offset delayed carry devices, this result being obtained in other ways in the disclosure of the patent to Walter, No. 1,805,060, wherein there is shown a series of alternating delayed and simultaneous carry devices, and in that of the patent to Chase, No. 1,845,863, wherein the carry zone is extended beyond the normal starting and stopping positions of the parts.

Other objects and advantages will appear hereinafter.

The invention consists in the novel construction and combinations of parts as set forth in the appended claims. I

In the accompanying drawings,

Figure 1 is a vertical sectional View, taken through the carry mechanism and associated parts, the members being shown in normal position of rest, with the carry elements restored to inactive position, parts being broken away.

Figure 2 is a plan view of a section of the carry mechanism, the parts being shown in the positions assumed in transferring a unit to a higher order wheel, and parts being broken away.

Figure 3 is a section on the line 33, Figure 1, showing the carry elements in inactive position.

Figure 4 is a detail section on the line 4-4, Figures 2 and 5.

Figure 5 is a bottom plan view of the carry shaft and associated parts, showing the lost motion connection and the friction device, parts being broken away.

Figure 6 is a diagrammatic view showing the carry elements and the restoring teeth, the carry elements being shown in a spiral arrangement for positive registration.

Fig. 7 is a similar view with the carry elements in a spiral arrangement for negative registration.

In the drawings, the invention is illustrated as projection 5, lying in the plane of a tooth 6 of a 10 V settable carry member I, pivotedupon a supporting shaft 8 and provided with a spring 9 adapted to hold the member I in either of two set positions; with the tooth 6 in the path of movement of the projection 5,or upon displace- 15 ment of the member 1, by projection 5, to hold an oppositely beveled surface l2 of member I in 'depressed position. There is a settable member 1 related to each active numeral wheel I of the machine. 20

Upon the drive shaft l3 are mounted a series of circumferentially channeled sleeves all of which are primarily designated I4, and certain of which have distinguishing exponents each sleeve being provided with two radial notches in 25 which are located two pivotal dogs or carry teeth, with certain exceptions noted hereinafter, all of said carry teeth being primarily designated 15 and certain thereof having distinguishing exponents one of said carry teeth acting to trans- 30 mit the carry to the next higher order numeral wheel in additive operations and the other in subtractive operations. The additive and subtractive carry dogs or teeth of the series of sleeves are angularly offset from one another to form intermediately of its length, being the aforesaid 5' segmental clip spring I6, and oppositely extending arms l8 and 19, extending the one into the plane of theprelated settable member I, and the other into the plane of the related gear 4, and as each dog is carried in the rotation of shaft I3, past the 5 place occupied by the beveled surface l2 when the related member I is held in active position, one arm of the dog will be depressed by the action of the cam surface and the other arm will be raised into engagement between the teeth of the intermediate gear 4 related to the next higher order numeral wheel. The dog is held in engaging position while passing through the gear, so that one step of movement is imparted to the higher order wheel, after which the dog, passing beyond the surface I2, will be retracted by ts spring H.

A double beveled tooth or double beveled teeth formed upon each sleeve will engage a pin 2! of member I, acting to cam said member into fully raised position, said teeth being all primarily designated 20 and certain thereof having distinguishing exponents.

It is to be noted that the movement of the dog or carry tooth into active position is radial of the teeth of the gear Q, so that the carrying may be transmitted before the intermediate gears have come fully to rest, without interference bealso to be noted that in high speed operation,

with the series of dogs separated from'each other by a very slight angular displacement, one arm of a dog may be engaged between the teeth of the related intermediate gear while the settable member I is being moved down against the opposite arm of the dog. Because of this latter arrangement, and since the dogs may be separated from one another angularly by a very slight or minimum distance, they may be mounted as a whole close to the driving shaft l3, having as shown the same radial extent as the differentially set actuators 22 of the machine. This will obviously reduce the speed of rotation of the dogs and consequently of the entire carry movement.

Due to the dogs or carry teeth being located as a whole close to the drive shaft l3 with consequently minimum offset relation to one another in a spiral series of minimum curvature which will not occupy so much of the operating cycle for a given number of carry places, it is possible to extend the carry of the tens to the extreme left hand numeral wheel in any shifted position of the carriage, without undue crowding of the carry phase of the cycle.

In the present embodiment, the opposed spiral series of carry teeth or dogs are each continued beyond a tooth |5a common to both series, wherein the problem arises of still having room for the proper placing of the restoring teeth for the settable carry members 1.

In order to provide for this, the carry teeth or dogs [52) related to the left hand carry mech-- anism and located immediately adjacent and next immediately adjacent said common tooth, each being a single tooth common to both spiral series, are automatically shiftable, in the rotation of shaft l3, from aligned position with one spiral series of carry teeth to aligned position with the other spiral series, to thereby serve as carry teeth of either spiral series; whereas the carry teeth or dogs I50 related to the right hand carry mechanism and located immediately adjacent and next immediately adjacent said common tooth, and of which there are the usual two couples of teeth separated by a considerable interval, are auto-, matically shiftable in the rotation of the shaft l3, so that the first tooth encountered by the sleeves Mb, Me which are loosely mounted on the drive shaft I3, and the loose sleeves have a lost motion connection (Figures 4 and 5) with certain of the fast sleeves M with each other comprising a notch 26, of a right hand fast sleeve l4 and a collar 24 carried by the adjacent right hand loose sleeve, said collar having a tooth 25 engaging the notch of the fast sleeve to thereby rotate the loose sleeve when an end wall of the notch contacts the tooth, said loose sleeve having a notch 26a engaged by a tooth 25a of a collar 24 carried by the second right hand loose sleeve to rotate the same likewise; the fast sleeve Ida having the dog [5a common to both spiral series having a notch 26bengaged by a tooth 25b of a collar 24 carried by the adjacent left hand loosesleeve to rotate the same after an end wall of the notch contacts the tooth, said loose sleeve having a notch 26c engaged by a tooth 250 of the second left hand loose sleeve to rotate the same in like manner.

The loose sleeves at the left of each shiftable couple are provided with friction devices 21, which will compel the sleeves and the dogs or carry teeth thereof to lag during the rotation of the carry shaft it until the lost motion is taken up. 2

. In the arrangement of the opposed spiral series of carry teeth disclosed herein, the settable carry members 1 of the left hand carry mechanism are depressed after the passage thereby of one of the series of carry teeth and must remain depressed until a tooth of the other series has been operated. Two restoring teeth 202) are therefore mounted on each of the left hand sleeves l lb, one on each side of a tooth l5b, of each sleeve, whereas the usual arrangement is followed for the right hand carry mechanism wherein a restoring tooth 200 is mounted on each sleeve M0 at some point midway between the two carry teeth or dogs thereof. I I

It will be noted that the sleeve 14a having the dog or carry tooth 15a common to both spiral series, and the loose sleeves Nb of the left hand carry mechanism have each but one carry tooth or dog instead of the usual two.

1. In a tens carry mechanism for calculating machines, numeral wheels having projections, gears related to said wheels, members individually settable by the projection of a related wheel, a drive shaft, opposed spiral series of carry teeth mounted for rotation with said shaft, some of said teeth being relatively fixed and the others being movable into and out of each of said series, the teeth of one or the other of said series according to the direction of rotation of said shaft being respectively engageable by the related settable member and thereby movable to contact the gear related to the numeral wheel of higher order, restoring teeth for the settable members also carried by said shaft, and means operable upon rotation of said shaft in either direction for adjusting said movable teeth into and out of said spiral series.

2. In tens carry mechanism for calculating machines, numeral wheels having projections,

gears related to said wheels, members individually wsettable by the-projection of a related wheel, a

drive shaft, opposed spiral series of carry teeth mounted for rotation with said shaft, the teeth of one or theother of said series according to the direction of rotation of said shaft being re- .spectively engageable by the related settable member and thereby movable to contact the gear related to the numeral wheel of higher order, and restoring teeth for the settable members also carried bysaid shaft; one of said spiral series of carry teeth being interrupted, and means whereby certain of the teeth of both series will be shifted automatically in the rotation of said shaft along with the related restoring teeth to interrupt the other series and correct the interruption of the first named series.

3. In tens carry mechanism for calculating machines, numeral wheels having projections, gears related to said wheels, members individually settable by the projection of a related wheel, a drive shaft, opposed spiral series of carry teeth mounted for rotation with said shaft and each continued beyond a tooth common to both series, the teeth of one or the other series according to the direction of rotation of said shaft being respectively engageable by the related settable member and thereby movable to contact the gear related to the numeral wheel of higher order, and restoring teeth for the settable members also carried by said shaft; one of the spiral series of carry teeth being interrupted with respect to teeth located beyond both ends of and adjacent to said common tooth, and means whereby certain of the teeth of the uninterrupted series located beyond one end of and adjacent to said common tooth and certain teeth of both series located beyond the other end of and adjacent to said common tooth along with the related restoring teeth will be automatically shifted in the rotation of said shaft to interrupt the other series of carry teeth and correct the interruption of the first named series.

4. In tens carry mechanism for calculating machines, numeral wheels having projections, gears related to said wheels, members individually settable by the projection of a related wheel, a drive shaft, opposed spiral series of carry teeth mounted for rotation with said shaft, the teeth of one or the other cf'said series according to the direction of rotation of said shaft being respectively engageable by the related settable member and thereby movable to contact the gear related to the numeral wheel of higher order, and restoring teeth for the settable members also carried by said shaft; sleeves fast on said shaft, sleeves loose on said shaft and having a lost motion connection with certain of said fast sleeves and with each other, said carry teeth and said restoring teeth being mounted for rotation with said sleeves, one of said spiral series of carry teeth being interrupted, and a friction device to compel the loose sleeves to lag until the lost motion is taken up, said loose sleeves and the carry teeth and the restoring teeth thereof being thereby automatically shifted in the rotation of said shaft to interrupt the other series of carry teeth and correct the interruption of the first named series,

5. In tens carry mechanism for calculating machines, numeral wheels having projections, gears related to said wheels, members indisettable member and thereby movable to contact the gear related to the numeral wheel of higher order, and restoring teeth for the settable members also carried by said shaft; sleeves fast on said shaft, sleeves loose on said shaft and having a lost motion connection with certain of said fast sleeves and with each other, said carry teeth and said restoring teeth being mounted for rotation with said sleeves, one of the spiral series of carry teeth being interrupted with respect to teeth located beyond both ends of and adjacent to said common tooth, and a friction device to compel the loose sleeves to lag until the lost motion is taken up, said loose sleeves and the carry teeth and the restoring teeth thereof being thereby automatically shifted in the rotation of said shaft to interrupt the other series of carry teeth and correct the interruption of the first named series.

6. In tens carry mechanism for calculating machines, numeral wheels having projections, gears related to said wheels, members individually settable by the projection of a related wheel, a drive shaft, opposed spiral series of carry teeth mounted for rotation with said shaft and each continued beyond a tooth common to both series, the teeth of one or the other series according to the direction of rotation of said shaft being respectively engageable by the related settable member and thereby movable to contact the gear related to the numeral wheel of higher order, and restoring teeth for the settable members also carried by said shaft; said carry teeth extending each at one end into the plane of the related settable member and at the other end into the plane of the related gear, having each a pivot located intermediately of its length and oppositely extending arms, sleeves fast on said shaft, sleeves loose on said shaft and having a lost motion connection with certain of the fast sleeves and with each other, said carry teeth and said restoring teeth being mounted for rotation with said sleeves, one of the spiral series of carry teeth being interrupted with respect to teeth located beyond both ends of and adjacent to said common tooth, and a friction device to compel the loose sleeves to lag until the lost motion is taken up, said loose sleeves and the carry teeth and the restoring teeth thereof being thereby automatically shifted in the rotation of said shaft to interrupt the other series of carry teeth and correct the interruption of the first named series.

EDWARD C. WALTER. 

